Plumber in Bulli

Bulli is split between two flood catchments, and that is not a technicality. The southern and western parts fall in Collins Creek, a fourteen square kilometre catchment running between Bellambi and Bulli that also covers Woonona, Russell Vale and Bellambi. The northern side falls in Hewitts Creek, the eight square kilometre catchment shared with Thirroul. Two catchments means two sets of Council studies, two sets of flood planning levels, and two different answers to the question "does this affect my street". Before we quote stormwater work in Bulli we check which one you are in.

Council has named the streets. In Hewitts Creek, Wollongong City Council identifies Black Diamond Place, where overflow affects Beacon Avenue, and the Bulli railway culvert, where inadequate infrastructure causes upstream flooding. In Collins Creek, Council names the Ursula Road area and Kells Crescent. These are Council's own words on Council's own catchment pages, not our guesses.

The Voluntary Purchase Scheme tells you how serious it is. In the Collins Creek catchment, Council has bought and cleared one property outright and has another earmarked. A council does not buy and demolish a house over a nuisance puddle. If you are in that catchment, the current document is the Collins Creek Floodplain Risk Management Study and Plan of September 2025, which replaced the 2014 combined-catchments plan and was rebuilt on the 2019 flood study using ARR2019 rainfall standards. Worth reading before you spend money on drainage.

410 millimetres in a day is the benchmark. In the 24 hours to 9am on 18 August 1998, Bulli Pass recorded 410 mm, second only to Mt Ousley's 445 mm. Mudslides closed several roads including the Pass, fifty homes flooded in north Wollongong, and insured losses ran to about $40 million in 1998 dollars. That is the event we size Bulli stormwater against: not a typical downpour, but the one that has already happened here once.

The housing stock runs from 1880s mining terraces to a 2006 estate. Mining started here in 1861 and the railway station opened on 21 June 1887, the first on the south coast, so Bulli has genuine Victorian and Federation stock, then decades of post-war infill after the Shire of Bulli was folded into Greater Wollongong in 1947, then the Sandon Point development, which fought through the courts from 2000 and ended up limited to 181 lots by 2006. Practically that means we might find galvanised steel and vitrified clay in one street and twenty-year-old PEX two streets away. We CCTV before quoting anything structural.

Bulli is beachfront and backed by escarpment at the same time. Bulli Beach and Sandon Point are inside the suburb, so salt attacks hot water casings, outdoor taps, roof flashings and gutter fixings faster here than inland. Behind you sits the escarpment, where Wollongong DCP 2009 Chapter E12 requires geotechnical assessment on land known or suspected to be subject to slope instability. Concentrating stormwater on sloping ground is a geotechnical question as well as a drainage one, and we will say so when it is.